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X-MEDIA XM-PEX-4S PCI-E 4-Port DB9 Serial/RS232 PCI Express (PCIe x1) Controller Card with Break-Out Cable | ASIX AX99100 Chipset | 16C450/16C550/16C650/16C750/16C950 UART
X-MEDIA

X-MEDIA XM-PEX-4S PCI-E 4-Port DB9 Serial/RS232 PCI Express (PCIe x1) Controller Card

Bottom line: The X-MEDIA XM-PEX-4S PCI-E 4-Port DB9 Serial/RS232 PCI Express is a specs-and-price decision rather than a crowd-consensus one in the expansion cards category. Check the specification table below against one or two close alternatives — on price and spec fit, not on star ratings.

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Mike Perry — Hardware researcher since 2014. For retro PC hardware and period-correct parts, synthesises manufacturer documentation, community compatibility lists and marketplace listings rather than first-hand lab testing. Core beat: GPU performance across gaming, rendering, and local-LLM inference.

Pros & Cons

Pros

  • ✓ Compliant with PCI Express specification Rev. 2.0
  • ✓ Backed by X-MEDIA's warranty and support channels

Cons

  • ✗ Confirm socket / form-factor / power-rating compatibility against your build before ordering
  • ✗ Price, stock, shipping and returns are set by the retailer and may have changed since this page was last updated

Manufacturer description

The X-MEDIA XM-PEX-4S, a powerful 4-port DB9 RS232 Serial PCI Express card with a breakout cable, perfect for expanding your computer's capabilities. With a maximum data rate of 115 Kbps per port, this card offers reliable connectivity for universal devices. It is designed with a form factor of Adapter and is compatible with PCI Express ports.

SpecPicks Verdict

SpecPicks scored X-MEDIA XM-PEX-4S PCI-E 4-Port DB9 Serial/RS232 PCI Express (PCIe… using a rating × review-volume × price-fit model applied to published specs and reviews across the expansion cards category. X-MEDIA's expansion cards lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.

Common buyer scenarios for expansion cards of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.

Key Features

  • Compliant with PCI Express specification Rev. 2.0
  • Compatible with industrial standard 16C450.16C550.16C650.16C750.16C950 UART
  • Support on chip 256-Byte depth FIFO in transmit, receive path of each serial port. Data transfer rate up to 115200bps on each port
  • Support 5-6-7-8-bit serial format, 1 or 2 Stop bit mode
  • Support MODEM signal CTS, DSR, RI, DCD, DTR, RTS can be converted to RS232 level. Odd, Even, No parity, space 0 and mark 1 etc.
  • Supported OS: Windows XP/Vista/7/8/8.1/10 (32&64Bit); Linux Kernel 4.x/3.x/2.6x

Full Specifications

BrandX-MEDIA
Style4-Port Serial PCIe Controller Card
Style Name4-Port Serial PCIe Controller Card
Model NumberXM-PEX-4S
Supported OSWindows XP/Vista/7/8/8.1/10 (32&64Bit); Linux Kernel 4.x/3.x/2.6x
CompatibilityLinux
Mfr Part NumberXM-PEX-4S
Compatible DevicesPersonal Computer
Hardware InterfacePCI Express x1, Serial Interface
Warranty Description1 Year Warranty
Item Dimensions L x W x H6.75"L x 5.75"W x 3"H
Full listing titleX-MEDIA XM-PEX-4S PCI-E 4-Port DB9 Serial/RS232 PCI Express (PCIe x1) Controller Card with Break-Out Cable | ASIX AX99100 Chipset | 16C450/16C550/16C650/16C750/16C950 UART

Ready to buy?

X-MEDIA XM-PEX-4S PCI-E 4-Port DB9 Serial/RS232 PCI Express (PCIe x1) Controller Card with Break-Out Cable | ASIX AX99100 Chipset | 16C450/16C550/16C650/16C750/16C950 UART is listed on Amazon. Price, availability, shipping and returns are set by Amazon and its sellers — check the listing for current terms. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.

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